Polyaspartic gel coats with improved weather and chlorine resistance
AssigneeBayer MaterialScience AG
InventorAhren Olson
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Abstract
The present invention provides a two-component coating composition comprising as component I (a) an acrylate modified amine functional polyaspartic acid ester having an acrylate/acid ester mixture of greater than 2 to 30 wt. % acrylate; (b) at least one moisture scavenger; (c) at least one deaerator; (d) at least one plasticizer; and optionally (e) a short chain polyol having a hydroxyl value of >100; and as component II one or more aliphatic polyisocyanates. Methods of preparing the coating composition, methods of coating a substrate, and coated substrates are also provided. The coating is particularly suitable as a gel coat.
Claims26
A coating composition comprising:
- (I) Component I comprising an acrylate modified amine functional polyaspartic acid ester having an acrylate/acid ester mixture of from greater than 2 to 30 wt. % acrylate;
- and
- (II) Component II consisting essentially of one or more aliphatic polyisocyanates.
A method of coating a substrate, the method comprising the step of mixing and applying Components I and II of a coating composition to a substrate using a spray apparatus, wherein the coating composition comprises:
- (I) Component I comprising of an acrylate modified amine functional polyaspartic acid ester having an acrylate/acid ester mixture of from greater than 2 top 30 wt. % acrylate;
- and
- (II) Component II consisting essentially of one or more aliphatic polyisocyanates.
A polyaspartic acid ester comprising:
- i) an acrylate modified polyaspartic acid ester consisting essentially of the reaction product of one or more (cyclo)aliphatic diamines, one or more diacrylates and one or more maleic and/or fumaric acid esters;
- and
- ii) a polyaspartic acid ester consisting essentially of the reaction product of one or more (cyclo)aliphatic diamines and one or more maleic and/or fumaric acid esters.
Dependencies are inferred from the claim text.